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Mask and color brushes were using the existing PBVH vertex "update tag"
to mark their modifications. This was mostly unnecessary, and causes
unnecessary calculation of normals. It also caused errors though,
because they didn't tag the corresponding PBVH node for normal
recalculation, causing problems on the borders of nodes, since one
node might accumulate into another's vertex normals, but the other
node wouldn't also accumulate and normalize the normals.
The solution is to only use the update tag for tagging deformed
vertices that need recalculated normals. Everything else is handled at
the PBVH node level (which was already the case, but it wasn't clear).
The update tag was also used for undo to tag the nodes corresponding to
changed vertices. This was wrong though, because normals and visibility
would also be recalculated for just color or mask undo steps. Instead,
just use local arrays to map from vertices to nodes.
Differential Revision: https://developer.blender.org/D15581
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This is a port of sculpt-dev's `SculptVertRef` refactor
(note that `SculptVertRef was renamed to PBVHVertRef`)
to master. `PBVHVertRef` is a structure that abstracts
the concept of a vertex in the sculpt code; it's simply
an `intptr_t` wrapped in a struct.
For `PBVH_FACES` and `PBVH_GRIDS` this struct stores a
vertex index, but for `BMesh` it stores a direct pointer
to a BMVert. The intptr_t is wrapped in a struct to prevent
the accidental usage of it as an index.
There are many reasons to do this:
* Right now `BMesh` verts are not logical sculpt verts;
to use the sculpt API they must first be converted to indices.
This requires a lot of indirect lookups into tables, leading to performance
loss. It has also led to greater code complexity and duplication.
* Having an abstract vertex type makes it feasible to have one unified
temporary attribute API for all three PBVH modes, which in turn
made it rather trivial to port sculpt brushes to DynTopo in
sculpt-dev (e.g. the layer brush, draw sharp, the smooth brushes,
the paint brushes, etc). This attribute API will be in a future patch.
* We need to do this anyway for the eventual move to C++.
Differential Revision: https://developer.blender.org/D14272
Reviewed By: Brecht Van Lommel
Ref D14272
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Use a shorter/simpler license convention, stops the header taking so
much space.
Follow the SPDX license specification: https://spdx.org/licenses
- C/C++/objc/objc++
- Python
- Shell Scripts
- CMake, GNUmakefile
While most of the source tree has been included
- `./extern/` was left out.
- `./intern/cycles` & `./intern/atomic` are also excluded because they
use different header conventions.
doc/license/SPDX-license-identifiers.txt has been added to list SPDX all
used identifiers.
See P2788 for the script that automated these edits.
Reviewed By: brecht, mont29, sergey
Ref D14069
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This is part of the project of converting `MVert` into `float3`.
(more details in T93602), The pbvh update flag is removed and
replaced with a bitmap stored in the PBVH structure. This
patch is similar to D13878. This is mainly setup for an eventual
performance improvement by removing the extra data from
mesh vertices, but if it's consistent with testing in the other patch
doing the same thing for another "temp tag", then it may actually
increase the speed of sculpt code slightly, since less memory needs
to be loaded when checking/changing the flags.
Differential Revision: https://developer.blender.org/D14000
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As described in T91186, this commit moves mesh vertex normals into a
contiguous array of float vectors in a custom data layer, how face
normals are currently stored.
The main interface is documented in `BKE_mesh.h`. Vertex and face
normals are now calculated on-demand and cached, retrieved with an
"ensure" function. Since the logical state of a mesh is now "has
normals when necessary", they can be retrieved from a `const` mesh.
The goal is to use on-demand calculation for all derived data, but
leave room for eager calculation for performance purposes (modifier
evaluation is threaded, but viewport data generation is not).
**Benefits**
This moves us closer to a SoA approach rather than the current AoS
paradigm. Accessing a contiguous `float3` is much more efficient than
retrieving data from a larger struct. The memory requirements for
accessing only normals or vertex locations are smaller, and at the
cost of more memory usage for just normals, they now don't have to
be converted between float and short, which also simplifies code
In the future, the remaining items can be removed from `MVert`,
leaving only `float3`, which has similar benefits (see T93602).
Removing the combination of derived and original data makes it
conceptually simpler to only calculate normals when necessary.
This is especially important now that we have more opportunities
for temporary meshes in geometry nodes.
**Performance**
In addition to the theoretical future performance improvements by
making `MVert == float3`, I've done some basic performance testing
on this patch directly. The data is fairly rough, but it gives an idea
about where things stand generally.
- Mesh line primitive 4m Verts: 1.16x faster (36 -> 31 ms),
showing that accessing just `MVert` is now more efficient.
- Spring Splash Screen: 1.03-1.06 -> 1.06-1.11 FPS, a very slight
change that at least shows there is no regression.
- Sprite Fright Snail Smoosh: 3.30-3.40 -> 3.42-3.50 FPS, a small
but observable speedup.
- Set Position Node with Scaled Normal: 1.36x faster (53 -> 39 ms),
shows that using normals in geometry nodes is faster.
- Normal Calculation 1.6m Vert Cube: 1.19x faster (25 -> 21 ms),
shows that calculating normals is slightly faster now.
- File Size of 1.6m Vert Cube: 1.03x smaller (214.7 -> 208.4 MB),
Normals are not saved in files, which can help with large meshes.
As for memory usage, it may be slightly more in some cases, but
I didn't observe any difference in the production files I tested.
**Tests**
Some modifiers and cycles test results need to be updated with this
commit, for two reasons:
- The subdivision surface modifier is not responsible for calculating
normals anymore. In master, the modifier creates different normals
than the result of the `Mesh` normal calculation, so this is a bug
fix.
- There are small differences in the results of some modifiers that
use normals because they are not converted to and from `short`
anymore.
**Future improvements**
- Remove `ModifierTypeInfo::dependsOnNormals`. Code in each modifier
already retrieves normals if they are needed anyway.
- Copy normals as part of a better CoW system for attributes.
- Make more areas use lazy instead of eager normal calculation.
- Remove `BKE_mesh_normals_tag_dirty` in more places since that is
now the default state of a new mesh.
- Possibly apply a similar change to derived face corner normals.
Differential Revision: https://developer.blender.org/D12770
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Ref T92709
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Reviewed By: JacquesLucke
Differential Revision: https://developer.blender.org/D10707
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This removes indentations from if statements by converting them to early
returns and continue.
Most of the code of brushes and tools has loops with a full indented
body inside of an if, which was also copied into some of the new tools.
Reviewed By: JacquesLucke
Differential Revision: https://developer.blender.org/D10333
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The paint_draw_cursor function was handling the cursor drawing for 2D
and 3D views of all paint modes, calculating the brush radius, updating
the SculptSession data and updating and drawing all sculpt cursor
overlays for different tools. It was almost impossible to understand when
and what was being drawn and in which state the GPU matrix was.
Now everyting is organized into different functions, with clear
separation between modes, sculpt tool overlays and different drawing
setups. Update and drawing functions are also separated (this allows to
skip one PBVH query on each cursor drawing).
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D8206
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This adds three functions to check the state of the stroke in the
StrokeCache, removing the references to first_time and
mirror_symmetry_pass from the code. This makes easier to understand what
each code path is doing inside of each tool.
Some tools were using mirror_symmetry_pass incorrectly, so this should
also fix unreported bugs with radial and tiling symmetry related to that.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D8164
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Threaded Sculpt is now always enabled by default. If it causes
performance problems compared single threaded sculpt it should be
considered a bug.
Reviewed By: sergey
Maniphest Tasks: T77638
Differential Revision: https://developer.blender.org/D7960
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This patch enables TBB as the default task scheduler. TBB stands for Threading Building Blocks and is developed by Intel. The library contains several threading patters. This patch maps blenders BLI_task_* function to their counterpart. After this patch we can add more patterns. A promising one is TBB:graph that can be used for depsgraph, draw manager and compositor.
Performance changes depends on the actual hardware. It was tested on different hardwares from laptops to workstations and we didn't detected any downgrade of the performance.
* Linux Xeon E5-2699 v4 got FPS boost from 12 to 17 using Spring's 04_010_A.anim.blend.
* AMD Ryzen Threadripper 2990WX 32-Core Animation playback goes from 9.5-10.5 FPS to 13.0-14.0 FPS on Agent 327 , 10_03_B.anim.blend.
Reviewed By: brecht, sergey
Differential Revision: https://developer.blender.org/D7475
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